Polymere ammoniumsalze aus N,N,N′,N′-tetramethylalkylendiaminen und N,N′-alkylenbis(chloracetamid)en

Long chain polymeric ammonium salts 3a–g and 4a were prepared in DMF/H₂O from N,N,N′,N′-tetramethylalkylenediamines 2a and 2b and N,N′-alkylenebis(chlorocetamide)s 1a–g . Some of them can be casted to clear transparent sheets. The chlorine atoms in 1a – g are activated by the adjacent carbonyl amino group. The polymer from N,N′-tetramethylenebis(chloroacetamide) ( 1d ) and N,N,N′,N′-tetramethylhexamethylenediamine (2b) shows an intrinsic viscosity of 61 ml/g, the highest value known for polyelectrolytes so far. The intrinsic viscosity decreases with increasing numbers of CH₂-groups in the monomers. The polymeric ammonium salts 3a – g and 4a give sheets from DMF solutions, which are soluble in water and stable under normal conditions. Polymers which are best suitable for the preparation of sheets show less hygroscopicity than the others, due to their structure. Intrinsic viscosities were calculated from the reduced specific viscosities measured in 0,4 _M KCl but may be also determined in water by the method of Yuan et al., plotting the reduced specific viscosities as a function of 1/√c.